Scaffold bracket structure



June 14, .1960 c. A. HARLAN SCAFFOLD BRACKET STRUCTURE 2 Sheets-Sheet 1 Filed Dec. 9, 1957 INVENTOR.

CA MPBE LL ALLEN HARLAN I L I l... |l.. T m

ATTO RNEYS June 14, 1960 c. A. HARLAN 2,940,716

SCAFFOLD BRACKET STRUCTURE Filed Dec. 9, 1957 2 Sheets-Sheet 2 FIG.5.

F F F8 9 Flo INVENTORS CAMPBELL ALLEN HARLAN ATTORNEYS 2,940,716 SCAFFOLD BRACKET STRUCTURE Campbell Allen Harlan, 3535 N. Adams, Birmingham, Mich.

Filed Dec. 9, 1957, Ser. No. 701,524 Claims. or. 248-226) This invention relates generally to scatfolds and refers more particularly to a scaffold structure capable of being mounted upon the skeleton framework of a building under construction.

In the erection of new buildings it is necessary to install electric wiring, conduits therefor, electric cables and fixtures upon the skeleton framework of such buildings. It is also necessary to provide a safe support for the workmen doing this work, especially if such installations are made at high elevations in the skeleton framework. Therefore, I have devised a scaffold construction which can be applied to and supported by the skeleton framework of the building at any desired elevation, especially where the skeleton framework includes vertically and horizontally extending frame members.

One of the essenial objects of the invention is to provide a scaffold structure that is sturdy in construction,

atent economical to manufacture, easy to apply to the skeleton framework of a building, and eflicient in use.

Another object is to provide a scaffold structure that includes an upright portion that may be readily interlocked with or hooked to an upright frame member, and that also includes a horizontal portion that may be supported upon a horizontal frame member.-

Another object is to provide a scaffold structure wherein the upright portion mentioned carries a shelf portion upon which a platform for workmen may rest, and wherein the horizontal portion is adjustable lengthwise of the upright portion to position the shelf portion at various:elevations relative to the horizontal frame member.

Another object is to provide a scaffold structure having means for clamping the upright portion to the horizontal frame member, whereby the horizontal portion mentioned cannot he accidentally displaced from its supporting horizontal frame member.

Another object is to provide a scaffold structure wherein the clamping means is also adjustable lengthwise of the upright portion relative to the adjustable horizontal portion.

Other objects, advantages and novel details of construction of this invention will be made more apparent as this description proceeds, especially when considered in connection with the accompanying drawings wherein:v

Figure 1 is a perspective view of one of the supporting brackets for a platform and showing such bracket mounted on the skeleton framework of a building.

Figure 2 is a plan view showing a platform supported on a pair of such brackets.

Figure 3 is a horizontal section on line 3-3 of Figure 1.

Figures 4 and 5 are side elevational views of the clamping means and associated parts for securing the brackets to the framework, respectively before and after operation of the clamping means, and showing portions of the framework with a part thereof in section.

Figure 6 is a vertical sectional view through the platform and showing in elevation the lower portion of a supporting bracket, with parts broken away and in section.

In the drawings, A is one of the vertical frame members 2 v or uprights of a skeleton framework of a building, and Bis a horizontal frame member crossing and attached to the vertical frame member A.

Preferably my scaifold comprises a plurality of brackets C which may be temporarily or detachably secured to the frame members A and B to support a platform D.

Each bracket C'is' adjacent to a vertical frame member A of the skeleton framework and includes a vertically extending box beam member C a horizontally extending shelf C comprising a pair of angle bars secured to opposite sides of the upright member C and an angular brace bar C for the outer end of the shelf C An angle bar abutrnent'or stop member 0* secured to the outer end of the member C serves to retain the platform D on the shelf portion C of the brackets C.

C are anti-friction ball bearings supported between the angle bars of the shelf C near the outer and inner ends thereof and projecting slightly above the upper surface thereof for supporting engagement with the-platform D.

At the upper end of the upright member C is a horizontally extending member or arm C which is adapted to extend across and beyond the rear face of the upright frame member A and is adapted to be detachably conneoted thereto. As specifically shown, the vertical frame member A is an angle bar, and the arm C has on opposite sides thereof forwardly opening hooks C" and C which may be alternatively engaged or interlocked with the flange A at the rear of the vertical frame member A, depending upon which side of said member A the arm C is placed. Vertically adjustably secured to the upright mem ber C intermediate its ends is a horizontal angle bar rail E adapted to rest upon the horizontal frame member B to support the bracket C at the desired height for the platform D. The horizontal flange of the rail E rests upon the horizontal flange B of the horizontal frame member B to carry the load of the bracket C. As specifically shown, one side of the vertical leg of the rail E is provided at opposite ends thereof with short angle bars E that are located beneath and have their horizontal flanges substantially parallel to the horizontal flange B of the horizontal member B.' The rail E is uponone side of the upright'member C while another horizontal angle bar rail E is upon the opposite side of the upright member C Clamping bolts E extend between and adjustably clamp the rails E and E upon opposite sides of the upright member C Downward tipping of the bracket C by the weight of the shelf C thereof is prevented by either the hook C or the hook C engaging the rear edge of the flange A of the vertical frame member A, as previously described. However, it is desirable to hold the rail E against accidental displacement from the horizontal clamping members of bars F and F located upon opposite sides of the upright member C and adjustably held by clamping bolts F On the clamping member F is mounted a bracket or support F to which an L-shaped arm F is pivoted at F Such angle arm F carries at its slotted free end a rod F that is disposed at right angles thereto and is adapted to be engaged with the rear face of the vertical flange B of the horizontal frame member B. A lever F is connected at one end by a pivot F to the angle arm F at an intermediate point thereof. Also, a fulcrum pivot F for the lever F' is connected to a link F" that is pivoted at F to the bracket F. This forms a toggle joint, which in the position of Figure 4, holds the rod F out of engagement with the horizontal frame member B, but in the position of Figure 5 holds the rod F in clamping engagement with the horizontal frame member B.

' With the construction as thus far described, the rail E and clamping means F may be adjusted on the upright member C of each bracket C, as required, to support the lz atto ta 2 re ation. a member B. When so adjusted, either of the hooks C or C of the brackets may be engaged with adjacent up- E h memb rs. A; a he r l s mispla ed amahe hQa Qutal-fr mememhere B- Iihele 1 '=Qt the toggle ioinfis then emn qyedite laeir he brackets C; he herizestal. men: s- B: atherebs held; h a s Er a a nst. disnlae m nt, he hmizpu a i firame be s; s'. The pl t orm; P s t at p aced. 2:; he he es 3 f. e; brac e s wisti -1 a a e. seafl ldr to be usedibuewQ v a a 4 t; he haras er; tithe wmhrequir s movemen zot. he. mattq m lalszna he same herizent l. plane, h addsistnal bra a s ts Caner b s. describe mo her memb Att nd- .x he p at o m-D. may: e e mmte l' lsusthy se lq atm ame sir ti a p an r m he she f: partisans aq he rac ets on hich: tt originally supported onto, theshelff; portions G? of the EQWBG rest d: racke s.- Q adja en her ol s i .!1 fi lii' tfifilzbyhe anti fric iq be rin s: C AYKRKL-Wflh? hel or io s.

Chaase n; e el o he p atfer a D: may: e s en p ishedtby a iu ment imea ls andlamp n me Eq p bet prightme b r 0. Q ha -t e eafie d may e lqe tedtr n O he -p i t; sire Qne ke oa ram WQFk Q s hebHi ina,

hat-1: am s m nv n on t A; cafiold racke s uc ure; for sew th. Med cal ty-m al elem n and. a hetizen l. tr etur -e em nto as leta ramew k f-a uildin ompris ng tmlup ight aeua siaa est a endi-abe eand-belqw.saida ri ut l stms ural elementi asuh tant ally sa alle e atian totsaid v ttisahstms t re i lement. orizon l: nn-e ed.,by sa d li tis ttt ee-n1 ,v and; a ted o he dct hah y: n: n e ei d jdt er sal-i tmst ral. leme t; id m being ewed; o ndanr ie t ag at -a; subst nt a y ht angle rom said pn'ght en. at t e pper d 1 f. and hav n ir eendla hori nt he fi -r ed y aid niehtzh am e w; a d, her zon al. arm d apted, to up r sa pla tp mr d hele n sec e omature.- isst ns; t s,v ubstantially r ht nglexirqta. sai i pri ht eam: a jacenthe ow r, d: ereqt, her zent-al an a s m on; a u ri h in ermed ate. he. ends he e fi qr rti a a i stm ntr l e he et and: adap d g st-nmwaid:ha antalst t stur el men o i on: atbaameuntesl .4 at r c-upr gh beast-fer ver ica adjust:

he. seared. mlqa a frame it to and carried;by ..saidh011imutal arm adjacentthe free end aforesaidthereof andadapted to be interlockedwith a portion of said yertical ,stmctural elementtat therear thereof.

2. The bracket stinging-described; in claim 1 wherein the horizontal armi s r ig id l y secured to and projects rearwardly from said uprightbeam to extend across and rearwardly beyond vertical structural element, and said horizontal shelf is rigidly secured to and projects forwardly from said upright beam to support a platform.

3. The bracket structure described in claim 1 wherein said leyeroperated-meanscomprises; a pivotally mounted 21mg; and an; elongated; rigid, element disposed at substantially right-angles --2111 (1,091111C18d to saidarm.

4. The bracket structure described in claimtl wherein said; let er operated means: comprises a substantially Lzshaped: rmmaving n 1esm the- L pivotally mounted on said horizontal-bar, an elongated rigid element disposed at substantially rightangles and connected to the other; leg of, the- L, and a connection between said l -sl rapedr arrni at; the juncture of, said legs operable to holdsaidg'elongated rigid elemcnt'alternately in and out disengagement with the rear of said vertical structural lement a 5 ThebracketSkflitWliQdescribedin claim 3 wherein the elongated rigjchelefiltbl'lt,is.L adjustably connected to said. ni otallwmeunt d; a j c nt ne nd ther of.

Re iegengeswCited in the. file of. this patent- UNITED; STATES, PATENTS 419,379 Talbot"- Ian. 14; 1890 762,640 Lewis June 14, 1904 1j104996 McI-Iale V July 28, 19-14 1970;439 Townsend Aug. 14; 1934 2,142,651 Michelson- Jan. 3, 1939 21340387" fPaquette- Feb; 1, 1944 $610248 Heller Feb. 23, 1954 i a, r f 'EQREIGN-qBAIENTS casein Great Bfitain: Apr. 19-50 

